Chapter 13 of The Theory of Poker by David Sklansky: Raising

In chapter 13 of The Theory of Poker, David Sklansky explains the many strategic purposes of raising and shows how a well-timed raise is often far superior to simply calling—and sometimes even better than folding.

The Big Picture: Raising and the Fundamental Theorem

Sklansky ties raising directly to the Fundamental Theorem of Poker: you profit when opponents play differently than they would if they could see your cards.

Every raise is aiming at one (or more) of these goals:

Avoid making a theoretical mistake yourself (by playing optimally).
Induce mistakes from your opponents (bad calls, bad folds, or bad future decisions).

He breaks the main reasons to raise into seven categories:

To get more money in the pot when you have the best hand.
To drive out opponents when you have the best hand.
To bluff or semi-bluff.
To get a free card.
To gain information.
To drive out worse hands when you may have the second-best hand.
To drive out better hands when a drawing hand bets.

1. Raising to Get More Money in the Pot

This is the most obvious reason: you believe you’re ahead and want opponents to put more money in with inferior hands.

Key nuances:

On early streets, you must balance value vs. deception:
- If raising will scare off hands that should call (by pot odds) if they knew your hand, you might sometimes just call to let them make a profitable mistake.
- But if they’re getting correct odds even against your real hand, you should usually raise—you profit from bigger pots when you’re a favorite.
As the pot gets large, disguising your hand becomes less important:
- You typically just raise for value and let them make whatever “correct” or “incorrect” calls they choose.
- Whether you prefer a call or a fold depends on pot odds vs. their drawing chances, but in any case, you usually want that extra bet in.

2. Not Raising to “Go for the Overcall”

Sometimes you actually get more total money by not raising at the end in multi-way pots.

Example structure:

Bettor on your right → you believe you beat them.
One or more players behind you → you are sure you beat them too.
If you raise:
- The bettor may call or fold.
- Players behind you are likely to fold (facing a raise).
If you just call:
- The players behind you also call, padding the pot.

Here, calling:

Keeps extra players in with clearly worse hands.
Avoids the risk of being reraised by the bettor if they actually have you beat.

However, for this to be correct:

You must be confident the players behind you do not have better hands than yours.
If someone behind might have you beat but wouldn’t call a raise, then you should raise to force out that better hand.

3. Raising to Drive Out Opponents (Cutting Their Odds)

When you raise to “knock people out,” what you’re really doing is reducing their pot odds.

Example idea:

Pot: $100
Player bets $10, you call → next player is calling $10 to win $120 = 12-to-1.
If instead you raise to $20:
- Pot becomes $130.
- Next player must call $20 → 6.5-to-1.

You’ve:

Nearly halved their price to win ratio.
Possibly turned a profitable call (correct by pot odds) into an unprofitable one.

Three outcomes for that player:

Call when odds are now bad → mistake, you gain.
Fold when odds are now bad → correct fold, but still better for you than letting him draw cheaply and possibly beat you.
Overcall when odds were good and you failed to raise → your mistake; you effectively subsidize his correct chase.

Sklansky walks through a draw example (two-pair vs a draw vs a pat flush) to show that:

Calling and allowing a properly priced draw costs you money in the long run.
Raising to make the draw incorrect is mathematically superior, even if the drawer sometimes hits and wins.

Core idea: when you raise to “drive them out,” your real goal is to make their call a mistake by slashing their odds.

4. Raising to Bluff or Semi-Bluff

Pure Bluff Raises

Used when there are no cards left to come (or your hand has no chance even if there are).
Risky, and in limit poker generally only profitable vs very strong, disciplined players who can fold decent hands.
Much more central in no-limit, where big pressure can force folds of strong hands—but misused, they are very expensive.

Semi-Bluff Raises

More important and more common:

You raise with a drawing hand that is currently behind but can hit and become best.
You may win by:
- Making everyone fold now.
- Hitting your draw later.
- Hitting a card that only looks scary, causing folds even if your hand didn’t actually improve that much.

Semi-bluff raises can also:

Act as defense vs someone else’s semi-bluff (force them to abandon their weak bluffing holdings).
Provide information (calling your raise usually indicates a real hand).
Set up a free card on the next round when they check to you.

5. Raising to Get a Free Card

Sometimes you raise with a draw not just for fold equity but specifically to:

Encourage opponents to check to you on the next street, letting you decide whether to bet or take a free card.

Requirements:

You must expect to be last to act on the next betting round.
The cost of raising now should be less than what you’d likely need to pay on the next street to see that card.

Example: in a $10–$20 hold’em game:

Raise for $10 on the flop to avoid paying $20 to call on the turn when your opponent would otherwise keep betting.

But the “free” card isn’t free:

It costs your raise, so you want extra benefits (fold equity, disguise, future value) in addition to the free-card equity.

6. Raising to Gain Information

Raising primarily to learn where you’re at is dangerous and should be used sparingly. Still, there are spots where:

You are heads-up on an early street.
Opponent is straightforward and interpretable.
A raise now can save you several bets later by revealing strength.

Example pattern:

You raise an open pair in stud with your strong but vulnerable hand.
If opponent reraises, you can often safely assume a very strong hand and fold early, saving big bets on later streets.
If opponent just calls, you know you’re facing something strong but not necessarily a monster, and can adjust.

But:

If your opponent is capable of semi-bluff reraises, the information can be misleading.
So in most cases, information should be a bonus, not the primary purpose of the raise.

7. Raising to Drive Out Worse Hands When You May Be Second Best

You sometimes raise with what you think is the second-best hand if:

There are other players in the pot with even worse hands (like straight/flush draws),
And you can get those worse hands to fold.

This can improve your overall winning chances:

Before the raise:
- Top hand: 50%
- You: 30%
- Two draws: 10% each
After a raise that drives out the draws:
- Top hand: 60%
- You: 40%

You went from 30% to 40% by shrinking the field—even though the top hand’s equity also went up.

This is especially relevant in stud: raising with a strong pair versus a made two pair plus multiple drawing hands behind.

8. Raising to Drive Out Better Hands When a Draw Bets

There are rare situations where:

A drawing hand (flush or straight draw) bets.
You have a mediocre made hand, and players behind you have better made hands than yours.

If:

You believe those better hands will fold facing a raise and a draw bettor, then:
- Your raise can isolate you vs the drawing hand.
- If the draw misses, your “worse made hand” wins the pot.
- You have turned a multi-way spot where you’re losing into a heads-up spot where you’re favored.

But:

If you think the better hands won’t fold to your raise, you shouldn’t even call—you’re simply outgunned in too many places.
This creates raise-or-fold spots where calling is clearly inferior.

Raise vs Call vs Fold: Why Calling Is Often Worst

A recurring theme:

In many critical spots, your choices are effectively raise or fold.
Calling leaves you:
- Giving opponents correct odds.
- Letting semi-bluffers keep all their ways to win.
- Sitting in the middle with the worst of both worlds.

Sklansky illustrates this with a mathematical example:

You have a 4-flush with one card to come.
Pot: $40, opponent bets $20 → you’re getting 3-to-1.
Odds against making the flush: 4-to-1.

If you call:

Over many repetitions, you lose money (negative expectation).

If instead you raise as a semi-bluff:

Suppose opponent folds 25% of the time and calls 75%.
When called, you still have your 20% chance to hit your flush.
The combination of:
- Winning immediately when he folds, plus
- Winning occasionally when your draw gets there,
turns the play from losing (calling) to profitable (raising).

That example shows a big swing in expectation purely from changing call → raise:

Calling: long-term loser.
Raising: long-term winner.

Final Summary

Chapter 13 argues that raising is not a rare, fancy move—it’s a core tool of expert play. Sklansky shows that you raise to:

Extract value when ahead.
Reduce opponents’ odds or knock them out.
Bluff or semi-bluff profitably.
Buy free cards cheaply.
Acquire useful information.
Improve your equity by shaping who remains in the pot.

And crucially, in many important spots:

Folding or raising are the only profitable options,
While calling is the quiet, comfortable, long-term losing play.

Or in his spirit: a player who mostly calls instead of raising or folding is, over time, a built-in source of profit for everyone else at the table.

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Lee Men

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